Those are 2 different classes neither of which are part of the JDK. One is a custom class that needs to be added to the build path whereas the other is part of the Apache Commons library which need to be added to the classpath.
La solution
Those are 2 different classes neither of which are part of the JDK. One is a custom class that needs to be added to the build path whereas the other is part of the Apache Commons library which need to be added to the classpath.